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(ModeL) 3 SheetsSheet 1.

W. H. BURNHAM & J. H. MILLER.

WINDMILL.

No. 891,401. Patented Oct. 23, 1888.

uvvnvrom ATTORNEY.

(Model) 3 Sheets-Sheet 2.

W. H. BURNI-IAM & J. H. MILLER.

WINDMILL.

No. 391,401. Patented Oct. 23, 1888.

HVI/EAITOR,

ATTORNEY WITNESSES: flax 6M (ModeL) 3 Sheets-Sheet 3.

W. H. BURNHAM & J. H. MILLER.

WINDMILL.

Ill/IA "lam E 8] llll i flkil Patented Oct. 23, 1888.

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UNITED STATES PATENT Trice.

\VILLIAM H. BURNHAM AND JOHN H. MILLER, OF BATAVIA, ILLINOIS, AS SIGNORSTO THE UNITED STATES XVIND ENGINE AND PUMP COMPANY,

OF SAME PLACE.

WlNDh/HLL.

SPECIFICATION forming part of Letters Patent No. 391.401, dated October23, 1.888.

Application filed November 14, 1887. Serial No. 255,038. (Modeh) To ctZZwhom, it may concern:

Be it known that we, \VILLIAM H. BURN- HAM and JOHN H. MILLER, citizensof the United States, and residents of Batavia, in the county of Kaneand State of Illinois,have invented new and useful Improvements in\Vindmills, of which the following is a specification, reference beinghad to the accompanying drawings illustrating the invention, in which--Figure 1, Sheet 1, is a perspective representation of a windmill inwhich is embodied our invention; Fig. 2, Sheet 2, an enlarged elevationof the truss-frame,turn-table,and other mechanism connected therewith;Fig. 3, an elevation,enlarged,of a detail portion; Fig. 4, Sheet 1, aninverted and enlarged perspective representation of one of theangle-irons by which the fan-bars are secured to the radial arms of thewind-wheel; Fig. 5, Sheet 3,a plan or top view of Fig. 1.

This invention relates to novel means for regulating the speed of thewind-wheel, and to angle-irons for securing the fanbars to the arms ofthe wind-wheel, as hereinafter fully set forth and shown.

G represents the tower, V the taitvane, T the side vane, S A F f thewind-wheel, and h the turn-table, of an ordinary windmill, except theangle-irons Y, which constitute a portion of our invention.

B represenls the trussframe, which is constructed higher and strongerthan has been the custom, and with cross-timbers 4 and5 for the supportof the auxiliary mechanism employed. The tail-spar, J engages a strongsocket-plate, X, which is pivoted to the turn table and othersupportingparts in a substantial manner, by means of which the said vane may havethe ordinary swinging movement.

The fan-bars ff, &c., are connected with the radial arms of thewind-wheel by means of angle-irons Y. (More clearly shown at Fig. 4.)These irons consist of a main cap-plate which has cast solid with it twoangular standards supporting two seats,b. These seats are provided attheir side edges with flanges c c,so that when the seats are bolted tothe arms of the wheel there will be no lateral movement of the iron.Between the standards which support the seats I) are formed socketsdd,in which the ends of the fan-bars fare made to fit, and projecting upfrom the main plate of the angleirons are pins 0 c, which, respectively,enter said bars,so that when the angle-iron is bolted to an arm, A, thefan-bars will be firmly held in place without any other fastening.

The means for regulating the speed of the wind-wheel is: Pivoted at 1 onthe turntable h is a weighted lever, K W, which holds the tail-sparJsubstantiallyin line with the shaft of the wind-wheel up to a certainpressure of wind on the wheel. After such certain pressure has beenattained the wheel would turn edgewise too much to the wind were it notfor the auxiliary weighted lever N L, which is pivoted to a centralsupport at P, and has a connection with the lever K by means of a rod,M.Above the weight W, and on rod M, is an adjustable stop, 3, and on thelower end of the rod is a nut or knob, and on the lever K is affixed aneyebolt, j, through which that portion of the rod M below the stop 3passes. This construction is such that by adjusting the stop 3 e11 rod Mthe lever K V may have any desired movement before the auxiliary lever NL has any effect in resisting the pressure of the wind on the wheel; butat such times as the upper lever is brought into use by the rod M andits stops such an additional force will so resist the action of the windon the wheel as to keep it in position to rotate after the lever K WVhas lostits power for that purpose.

a a represent theirons forsecuring the turntable to the lower track, andR represents the rollers between the turn-table and track.

7 1" represent the positions a buffer and buffer-stop may occupy toprevent the tailvane from a too sudden stop in changing its position.

H 2 is the post through which a furling cord or rod, 0, passes. Bydrawing on this cord both levers K NV and N L are elevated and the wheelput edgewise to the wind.

0 E represent the priuci pal rods for the support of the vanes with thetop of the tower D g, and U is the rod which serves to connect the elbowportion of the lever K W with the plate which supports the tail-vane.

Having thus described our invention, what we claim as new is- 1. Animprovement in windmills, consisting of the lever K, weighted at \V,linked to the tail-vane, and pivoted to the turn-table h at I, incombination with an upper lever, N, which is weighted at L and pivotedto the top P of the central support, H 2, and a connecting-rod, M, whichis jointed to the lever N, passes through the eyeboltj, and is providedwith an adjustable stop, 3, and an enlarged lower end, the tail-vane J,turn-table h, and wind-wheel, as specified.

2. The angle-iron Y cast in one piece of metal, with a base-platesupporting two standards, which are provided with flanged seats 6 I) eb, and the pins 0 c, projecting into the re- 20 cesses d d between thestandards and from the main plate, in combination with the fan-bars f,held in said recesses, and the arm of the wheel secured to the seats I)b, substantially as specified and shown.

WILLIAM H. BURNHAM. JOHN H. MILLER.

\Vitnesses:

G. L. CHAPIN, H. G. SHUMWAY.

